Avaliação da qualidade ambiental, utilizando invertebrados bentônicos, nos rios Atibaia, Atibainha e Cachoeira, SP / Envitonmental quality assessment using benthic invertebrates: Atibaia, Atibainha, and Cahoeira rivers, São Paulo, Brazil

AUTOR(ES)

Helio Rubens Victorino Imbimbo

DATA DE PUBLICAÇÃO

2006

RESUMO

Immature insects of the Orders Ephemeroptera, Plecoptera and Trichoptera (EPT) are considered sensible members of the macrobenthic community in lotic ecosystems. Accordingly, they are often used as indicators of environmental disturbances as pollution. Eight sampling sites were established along the rivers Atibainha, Cachoeira and Atibaia of Piracicaba river basin, São Paulo, Brazil, where water and sediment quality, toxicity, as well as EPT composition in six different habitats, were determined in dry and wet seasons. The results showed a pollution gradient along the water stream matched with EPT index at genus and family levels. It was not possible to select groups of taxa as indicators of degraded and preserved environmental conditions because most of genera occurring are tolerant to pollution. It is recommended the use of EPT index in family level in stream biomonitoring programs for regional purposes.

ASSUNTO(S)

2 plecoptera 3 trichoptera 3 trichoptera 4 environmental quality 1 ephemeroptera 1 ephemeroptera 2 plecoptera 4 qualidade ambiental

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